ac 1. Heading题法 Part 1 The Statue of Liberty Part 2 Barbie Five Famous Symbols of Part 3 American Gothic American Culture Part 4 The Buffalo Nickel Part 5 Uncle sam 时间法Title Heading 1 Heading 2 Heading 5 Heading 4 Heading 3 Part 1 Part 2 Part 3 Part 4 Part 5 Five Famous Symbols of American Culture 标题法 The Statue of Liberty Barbie American Gothic The Buffalo Nickel Uncle Sam Back 1. Heading (标题法) 时间法